{ "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-29T22:28:47.410696+00:00", "record_id": "VXI-EXT-ICE07-OCI-REFERRERS-404-FALLBACK-BOUNDARY-01-v1", "record_kind": "external_reference", "title": "Does a referrers API 404 prove no OCI evidence exists", "system": "Open Containers Initiative", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Does a referrers API 404 prove no OCI evidence exists?", "near_questions": [ "What follows a referrers API 404?", "Does unsupported discovery mean no signatures?", "Where is legacy referrer evidence stored?", "When is an absence conclusion premature?" ], "supported_claims": [ { "claim": "Distribution 1.1.1 requires referrers tag-schema fallback after a referrers API 404. API failure alone is not completed discovery.", "reliance": "DOCUMENTED_CAPABILITY_ONLY" } ], "not_demonstrated_claims": [ "Do not report absent signatures or SBOMs before evaluating the fallback result.", "Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.", "No expanded capabilities or licences for existing INDEX executables." ], "public_summary": "Distribution 1.1.1 requires referrers tag-schema fallback after a referrers API 404. API failure alone is not completed discovery.", "related_record_ids": [], "source_review": { "source_type": "official_external_documentation", "source_title": "Open Container Initiative Distribution Specification", "source_url": "https://raw.githubusercontent.com/opencontainers/distribution-spec/v1.1.1/spec.md", "checked_on": "2026-10-29", "candidate_record_id": "VXI-EXT-ICE07-OCI-REFERRERS-404-FALLBACK-BOUNDARY-01-v1", "candidate_record_sha256": "4e217866828b1559a09e9fe899b1a8a05ae89ded72da94a73b4ab643d8011fae", "method": "Primary documentation reviewed for the published bounded statement.", "deployment_tested_by_varexis": false, "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research." }, "answer_policy": { "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY", "bounded_answer": "Distribution 1.1.1 requires referrers tag-schema fallback after a referrers API 404. API failure alone is not completed discovery.", "required_buyer_context": "API response; repository and digest; tag-schema response; registry capability. Buyer deployment not inspected.", "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state." }, "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.", "decision_profile": { "schema": "varexis-vendor-evidence-review/1", "review_status": "documentation_review_only", "checked_on": "2026-10-29", "claim_to_check": "Does a referrers API 404 prove no OCI evidence exists?", "documented_statement": { "status": "documented", "statement": "Distribution 1.1.1 requires referrers tag-schema fallback after a referrers API 404. API failure alone is not completed discovery.", "source_ids": [ "oci-distribution" ] }, "review_inference": { "status": "review_inference", "statement": "Distinguish unsupported discovery from missing attachments. Require the missing evidence before accepting, retrying or closing the operation. Registry fallback differs from private transparency-log absence. This is an operational review inference, not an observed deployment outcome.", "source_ids": [ "oci-distribution" ] }, "buyer_evidence_required": [ "API response", "repository and digest", "tag-schema response", "registry capability" ], "review_condition": { "status": "varexis_review_policy", "statement": "Do not report absent signatures or SBOMs before evaluating the fallback result." }, "unknowns": "The buyer implementation, effective authority, source-data completeness and actual business outcomes were not inspected.", "unknown_finding": { "status": "unknown", "statement": "No buyer deployment or transaction was observed." }, "evidence_sources": [ { "source_id": "oci-distribution", "url": "https://raw.githubusercontent.com/opencontainers/distribution-spec/v1.1.1/spec.md", "final_url": "https://raw.githubusercontent.com/opencontainers/distribution-spec/v1.1.1/spec.md", "captured_at_utc": "2026-10-29T22:17:23.241867+00:00", "status": 200, "content_type": "text/plain; charset=utf-8", "bytes": 47162, "sha256": "360b29820869bfaac5f73ebfa30669c9172c069ef619f8c6689acc3bcef6f719", "publisher": "Open Containers Initiative", "title": "Open Container Initiative Distribution Specification", "version_context": "OCI Distribution 1.1.1 (a139cc423184af6078077b9b7ee336eddbd03f8f)", "rights_disposition": "Original bounded paraphrase with source attribution. Captured source body remains private; no source-body redistribution. Specification published under Apache-2.0; attribution retained; marks excluded.", "checked_on": "2026-10-29", "capture_status": 200, "claim_review_completed": true, "hash_basis": "SHA-256 of captured HTTP response body bytes", "reviewed_sections": [ "Listing Referrers", "Deleting tags", "Deleting Manifests", "Mounting a blob from another repository" ] } ], "observed_deployment": false, "commercial_reliance_boundary": "Documentation supports only the stated boundary. Existing licensed checkers analyse supported supplied declarations locally; they do not inspect provider accounts, verify live behaviour, enforce decisions or certify compliance.", "paid_value": { "decision_context": "Distinguish unsupported discovery from missing attachments. Require the missing evidence before accepting, retrying or closing the operation.", "free": "Complete source review, questions, provenance and limitations; free to read and save locally.", "single_request": "Unavailable for this publication-only record; historical saved retrieval is unchanged.", "evidence_receipt": "Unavailable for this publication-only record; no paid retrieval entitlement is added.", "excluded": [ "Fresh source research", "Native provider integration or schema support", "Live inspection or runtime enforcement", "Payment settlement or verified deletion", "Certification or expanded licences" ], "integrity": "Hashes identify content versions; they do not prove factual truth or provide a signature." }, "revalidation": { "trigger": "Recheck current primary documentation and the applicable API, service, account and configuration before reliance. No ongoing monitoring is included.", "specific_watch": "Listing Referrers" }, "buyer_relevance": "Distinguish unsupported discovery from missing attachments. Require the missing evidence before accepting, retrying or closing the operation.", "refusal_conditions": [ "Do not report absent signatures or SBOMs before evaluating the fallback result.", "Do not infer deployment conformance, authority or successful outcomes from source documentation." ], "decision_context": { "operator": "Release consumer or supply-chain reviewer", "scenario": "Distinguish unsupported discovery from missing attachments.", "consequence": "Require the missing evidence before accepting, retrying or closing the operation.", "confidence": "High for captured documentation; buyer applicability and deployed behaviour unverified." }, "novelty_review": { "candidate_id": "ICE07-022", "disposition": "EXTENSION", "nearest_record_id": "VXI-EXT-ICE05-GITHUB-PRIVATE-ATTESTATION-LOG-ABSENCE-01-v1", "nearest_record_url": "/varexis-index/records/github-private-attestation-log-absence.json", "nearest_record_sha256": "47e0129decc58792cc38052fad59982759c106805316fdeb041f874f67d1e45b", "material_distinction": "Registry fallback differs from private transparency-log absence.", "review_status": "PASS: implementing-agent source and duplication review" }, "optional_selection": { "guide_id": "software-artifact-acceptance", "guide_url": "/index-guides/software-artifact-acceptance", "guide_manifest": "/varexis-index/decision-guides.json", "checker": { "product_id": "agent-audit-coverage", "price_gbp_excluding_vat": 79, "purchase_url": "/index-access?route=agentic_pack_audit_coverage_v1", "licence_scope": "Existing separate internal-use licence; subscriptions do not include the executable.", "benefit": "Optional local analysis of supported supplied declarations only; no native provider integration or verification is added." }, "boundary": "Optional Audit Coverage only reconciles supported declared event chains and completeness. It does not connect to these services, verify signatures, inspect queues, execute recovery or approve software." }, "exact_access": { "endpoint": "/mcp/catalogue", "tool": "get_publication_record", "arguments": { "record_id": "VXI-EXT-ICE07-OCI-REFERRERS-404-FALLBACK-BOUNDARY-01-v1" }, "record_url": "/varexis-index/records/oci-referrers-404-fallback-boundary.json", "original_mcp_search": false, "paid_saved_retrieval": false } }, "niche": { "niche_id": "ice07-dependency", "label": "Dependency/Advisory Reliance Boundaries", "classification_id": "dependency", "classification_label": "Dependency/Advisory Reliance Boundaries", "topic_id": "dependency", "buyer_intent": "Distinguish unsupported discovery from missing attachments. Require the missing evidence before accepting, retrying or closing the operation.", "comparison_role": "supplementary_discovery" }, "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.", "service_route": { "request_guide": "/varexis-index/request.html", "request_workflow": "/varexis-index/request-workflow.json", "service_id": "single_request", "service_routes_url": "/varexis-index/service-routes.json", "payment_required": true, "availability_endpoint": "/api/index/capabilities", "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED", "checkout_url": "/index-access" }, "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.", "human_page": "/varexis-index/catalog.html#oci-referrers-404-fallback-boundary", "machine_readable_record": "/varexis-index/records/oci-referrers-404-fallback-boundary.json" }